The impact of general anesthesia surgery on the brain

Oct 11, 2022 Source: Cainiu Health

Dr. Yang Jun

Introduction

General anesthesia does not have adverse effects on the brain. Currently, most general anesthetics are either inhaled or administered intravenously, and these anesthetic agents have relatively short half-lives, meaning they are quickly metabolized after surgery and do not negatively affect the patient's brain. However, general anesthesia may have some impact on certain special populations, such as infants, young children, and elderly patients.

In general, general anesthesia does not have adverse effects on the brain. However, special populations, such as infants, young children, and elderly individuals, should undergo general anesthesia with caution.

General anesthetics temporarily induce a state of unconsciousness to ensure patients do not feel pain during surgery. Before the procedure, anesthesiologists assess each patient's health status and select appropriate medications and dosages accordingly. Most modern general anesthesia uses either inhaled or intravenous agents, which typically have short half-lives and are rapidly metabolized after surgery, leaving no harmful impact on the brain.

Nevertheless, general anesthesia may affect certain vulnerable groups. For example, some elderly patients may experience postoperative delirium, postoperative cognitive dysfunction, insomnia, memory decline, emotional agitation, or irritability. Additionally, prolonged or repeated anesthesia may potentially influence brain development in infants and young children. It is therefore recommended that these high-risk individuals consult physicians at正规 medical institutions before undergoing general anesthesia to ensure both surgical effectiveness and postoperative safety.

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The patient became confused after general anesthesia surgery.

After general anesthesia, a person may become confused, possibly due to factors such as anesthetic drugs, surgical trauma and inflammatory responses, or prolonged bed rest, which requires symptomatic treatment. Additionally, other conditions such as hypoglycemia, insufficient cerebral blood supply, or cerebral infarction could also be responsible. It is recommended that patients seek medical attention promptly if they experience any discomfort to avoid delays in treatment. In daily life, a light diet and adequate rest are also important.

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Can I undergo general anesthesia surgery if I have an occasional cough one day?

Whether occasional coughing on a given day allows for general anesthesia surgery usually depends on the underlying cause. If the cough is due to physiological factors, surgery can generally proceed. However, if it results from a cold caused by pathogens such as respiratory syncytial virus or adenovirus, or from bronchopneumonia triggered by sudden temperature changes, poor environmental conditions, or other infections, surgery is generally not recommended.

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Can't you drink even a drop of water before general anesthesia surgery?

Not even a single drop of water should be consumed before general anesthesia surgery. General anesthesia refers to the administration of anesthetic agents through the respiratory tract or intravenous route to induce temporary suppression of the central nervous system. During the procedure, patients lose consciousness, experience complete loss of pain sensation, suppressed reflexes, and skeletal muscle relaxation, which facilitates surgical operations. Strict restrictions are imposed on eating and drinking, including water intake, prior to general anesthesia.

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Is it not allowed to wear underwear during general anesthesia surgery?

Whether underwear can be worn during general anesthesia surgery depends on the specific circumstances. For surgeries involving the upper limbs or五官 (facial organs), especially those of lower surgical grade and short duration, wearing underwear is generally acceptable as long as it does not interfere with the proper functioning of anesthesia monitoring equipment. However, if the surgical site is located in the lower limbs, perineal area, or abdomen, patients are generally not allowed to wear underwear during general anesthesia surgery to avoid interfering with local disinfection and increasing the risk of infection.

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What should the blood pressure be kept under during general anesthesia surgery?

For general anesthesia surgery, blood pressure should ideally be controlled at less than 140/90 mmHg, with diastolic pressure maintained between 60–90 mmHg. After surgery, vital signs—including heart rate, blood pressure, and respiratory rate—should generally be closely monitored. Following anesthesia and surgery, the body is typically weak, and proper positioning should be ensured during this period.

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What are the dietary precautions after general anesthesia surgery?

Begin eating after bowel movements or flatus following abdominal surgery. For non-abdominal surgeries, eat once fully awake or 4 hours post-operation. After esophageal, intestinal, or gastro-intestinal anastomosis surgery, start with small amounts of water 2–3 days post-operation. Diet after abdominal surgery should primarily consist of liquids, gradually transitioning to semi-liquid foods. After non-abdominal surgery, focus on light and easily digestible foods. Following gastric or gastrointestinal surgery, resume a normal diet only after the wound has fully healed.

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Can I still breastfeed after having general anesthesia during lactation?

Generally, breastfeeding is not recommended after undergoing general anesthesia surgery during lactation. The detailed analysis is as follows: General anesthesia may affect breastfeeding, so it is generally advised not to breastfeed after general anesthesia surgery while lactating. With general anesthesia, drugs enter the bloodstream and may potentially affect the infant's nervous system and respiratory system. Therefore, the choice of anesthetic agents is crucial.

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Is it serious to drink a sip of water before general anesthesia surgery?

General anesthesia surgery generally refers to general anesthesia. Drinking even a small amount of water before general anesthesia can directly affect the surgical procedure, so it is quite serious. General anesthesia typically involves the use of sedatives and analgesics to reduce the patient's surgical pain. These medications can cause muscle relaxation and stimulate the gastrointestinal tract, potentially leading to vomiting. Under normal circumstances, patients must strictly abstain from food and drink prior to general anesthesia to prevent an increase in stomach contents.

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